Impact of climate change on site characteristics of eight major astronomical observatories using high-resolution global climate projections until 2050

Haslebacher, Caroline; Demory, Marie-Estelle; Demory, B. O.; Sarazin, M.; Vidale, Pier Luigi

doi:10.1051/0004-6361/202142493

Cited by 9 publications

(6 citation statements)

References 99 publications

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“…As our EW Hα calculation algorithm does not actively correct for the telluric lines, it is reasonable to assume the EW Hα measurements are subject to effects from atmospheric water content. However, when compared to the historic precipitable water vapor measurements from Siding Spring (e.g., those in Haslebacher et al 2022), no strong correlation is evident.…”

Section: Hα Equivalent Width Measurementsmentioning

confidence: 80%

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions*

Laliotis

Burt

Mamajek

et al. 2023

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Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6 m class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high-priority goal of the Astro2020 Decadal Survey. To prepare for future direct imaging (DI) surveys, the list of potential targets should be thoroughly vetted to maximize efficiency and scientific yield. We present an analysis of archival radial velocity data for southern stars from the NASA/NSF Extreme Precision Radial Velocity (EPRV) Working Group’s list of high-priority target stars for future DI missions (drawn from the HabEx, LUVOIR, and Starshade Rendezvous studies). For each star, we constrain the region of companion mass and period parameter space we are already sensitive to based on the observational baseline, sampling, and precision of the archival radial velocity (RV) data. Additionally, for some of the targets, we report new estimates of magnetic activity cycle periods, rotation periods, improved orbital parameters for previously known exoplanets, and new candidate planet signals that require further vetting or observations to confirm. Our results show that for many of these stars we are not yet sensitive to even Saturn-mass planets in the habitable zone, let alone smaller planets, highlighting the need for future EPRV vetting efforts before the launch of a DI mission. We present evidence that the candidate temperate super-Earth exoplanet HD 85512b is most likely due to the star’s rotation, and report an RV acceleration for δ Pav that supports the existence of a distant giant planet previously inferred from astrometry.

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Section: Hα Equivalent Width Measurementsmentioning

confidence: 80%

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions*

Laliotis

Burt

Mamajek

et al. 2023

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“…However, when compared to the historic precipitable water vapor mea-surements from Siding Spring (e.g. those in Haslebacher et al (2022)), no strong correlation is evident.…”

Section: Hα Equivalent Width Measurementsmentioning

confidence: 88%

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions

Laliotis¹,

Burt²,

Mamajek³

et al. 2023

Preprint

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Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6-m-class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high priority goal of the Astro2020 Decadal Survey. To prepare for future direct imaging surveys, the list of potential targets should be thoroughly vetted to maximize efficiency and scientific yield. We present an analysis of archival radial velocity data for southern stars from the NASA/NSF Extreme Precision Radial Velocity Working Group's list of high priority target stars for future direct imaging missions (drawn from the HabEx, LUVOIR, and Starshade Rendezvous studies). For each star, we constrain the region of companion mass and period parameter space we are already sensitive to based on the observational baseline, sampling, and precision of the archival RV data. Additionally, for some of the targets we report new estimates of magnetic activity cycle periods, rotation periods, improved orbital parameters for previously known exoplanets, and new candidate planet signals that require further vetting or observations to confirm. Our results show that for many of these stars we are not yet sensitive to even Saturn-mass planets in the habitable zone, let alone smaller planets, highlighting the need for future EPRV vetting efforts before the launch of a direct imaging mission. We present evidence that the

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“…Because of the large range of spatial scales involved between individual convective clouds and the large‐scale flow, relatively few studies have explicitly simulated both processes due to computational cost (e.g., Liu et al ., 2009; Holloway et al ., 2012; Ferrett et al ., 2021; Hertwig et al ., 2021; Haslebacher et al ., 2022). To keep the computational cost manageable, most studies have used GCMs with parametrized convection (e.g., Randall et al ., 2007; Lin et al ., 2008; Endris et al ., 2021; Muetzelfeldt et al ., 2021).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the CoMorph‐A parametrization using idealized simulations of the two‐way coupling between convection and large‐scale dynamics

Daleu

Plant

Stirling

et al. 2023

Quart J Royal Meteoro Soc

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We present a new methodology to test the interactions of convection schemes with their larger‐scale environment. A single‐column model (SCM) using the new Met Office convection scheme, CoMorph‐A, and the new Met Office NERC Cloud‐Resolving Model (CRM) are coupled to damped‐gravity wave derived large‐scale dynamics. The coupled models are used to investigate convective responses to stimulus forcings under the influence of interactive large‐scale dynamics. Within CoMorph‐A, the default entrainment varies with the prediction of convection size that is dependent on earlier rainfall, and the sensitivity of the SCM results to the entrainment formulation is explored. We demonstrate that the behaviour of the SCM using CoMorph‐A is now very similar to that of the CRM.For temperature or moisture stimulus applied separately, the SCM adjusts to a new equilibrium that is similar to that in the CRM, but its transient convective responses to stimuli acting to suppress convection are markedly too fast. For a combination of stimuli acting to enhance convection, the SCM responses are stronger than in the CRM. Finally, convective rainfall in the SCM is relatively insensitive to a combination of stimuli acting to enhance and suppress convection simultaneously, in agreement with the CRM. However, the SCM recovery from a non‐precipitating state is overly delayed for the default entrainment formulation but is too rapid when the entrainment rate is fixed at a low rate to represent only the deep convective state.We examined the responses to moisture stimuli of different strengths. Both models produce a monotonic increase of precipitation with column relative humidity (CRH) as well as the sharp increase of precipitation as CRH exceeds a threshold, as seen in observations. While both models correctly capture the observed CRH threshold, differences from the observed precipitation‐CRH relationship are noted. For instance, above the threshold the increase of precipitation with CRH is more abrupt in the SCM than in the CRM and observations. A similar behaviour is obtained in the SCM using low entrainment rate.This article is protected by copyright. All rights reserved.

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Impact of climate change on site characteristics of eight major astronomical observatories using high-resolution global climate projections until 2050

Cited by 9 publications

References 99 publications

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions*

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions*

Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions

Evaluating the CoMorph‐A parametrization using idealized simulations of the two‐way coupling between convection and large‐scale dynamics

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